The initial idea about a blog was that it could represent a place where its owner or administrator posts his thoughts, opinions or any news considered by him as being worthy. The readers are allowed to share their agreements/disagreements, usually in the form of the comments.
Unfortunately (only for some and fortunately for many of us), the Internet hasn’t been for long an easy way to exchange information as it was initially designed; it is an interactive world-wide community and, at the same time, it turns into a prospective economical market. It is not such a big surprise but almost 75% of the blogs have been created because of the possibility to bring some extra money to the owners (but very few really do it!).